The WSO2 Enterprise Service Bus (ESB) is a fast, lightweight and user friendly open source ESB distributed under the Apache Software License v2.0. WSO2 ESB allows system administrators and developers to conveniently configure message routing, mediation, transformation, logging, task scheduling, fail over routing, load balancing and more. It also supports transport switching, eventing, rule based mediation and priority based mediation for advanced integration requirements. The ESB runtime is designed to be completely asynchronous, non-blocking and streaming based on the Apache Synapse mediation engine.

WSO2 ESB is developed on top of the revolutionary WSO2 Carbon platform, an OSGi based framework that provides seamless modularity to your SOA via componentization. This release also contains many new features and a range of optional components (add-ons) that can be installed to customize the behavior of the ESB. Further, any existing features of the ESB which are not required to your environment can be easily removed using the underlying provisioning framework of Carbon. In brief, WSO2 ESB can be fully customized and tailored to meet your exact SOA needs.

The bug fixes included in this release are both in the base framework as well as the ESB specific components. For more information on the defect fixes, refer to the following pages in WSO2 Oxygen Tank:

Known Issues

Community and Support

WSO2 is willing to provide you guidance for any technical issues or questions regarding the ESB product. You can communicate with the WSO2 ESB development team directly using the following mailing lists:

If you want to have a public discussion with other users as well as developers, you can use theWSO2 ESB Forumfor developers and users.

WSO2 encourages you to report issues and enhancement requests for the WSO2 ESB using the publicJIRA. You can track their resolutions and comment on the progress.

WSO2 also offers a variety of development and production support programs, ranging from Web-based support during normal business hours, to premium 24x7 phone support.We are committed to ensuring that your enterprise middleware deployment is completely supported from evaluation to production. Our unique approach ensures that support leverages our open development methodology and is provided by the very same engineers who build the products.For additional support information please refer tohttp://wso2.com/support.

About the Documentation

The purpose of this documentation is to provide you with information for installing, configuring and implementingWSO2 ESB 4.0.2. To find a specific topic in a particular section, click on the topic name in the Table of Contents.

Getting Started

The following topics introduce the WSO2 Enterprise Service Bus (ESB) to first-time users and explain its contents and features: